Series Is Presented Here As Two Variables--(1)--Original Data, 1920-1942 (2)--Original Data, 1939-1957. The Series May Be Extended Through July 1948, When Nicb Discontinued Its Compilation Of Payroll Statistics (See Nicb Management Record, October 1948, P. 504). The Following Segment Is Not Comparable In Industry Coverage. Source: National Industrial Conference Board, For 1920-1931 Data: "Wages, Hours, And Employment In The United States, 1914-1936", Nicb Studies No. 229, 1936; For 1932-1933 Data: Supplement To Nicb Service Letter, June 1938; For 1934-1935: Economic Record, March 28, 1940; For 1936-1942, Nicb Management Record, January 1945.
This NBER data series m08216a appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: m08216a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Index of Factory Employment, Chemicals for United States [M0816AUSM330NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0816AUSM330NNBR/, July 29, 2015.